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英语文法:谓语动词后不定式的作用

(2020-08-22 01:33:50)
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教育

英语学习

英语语法

分类: 英文文法

英语文法: 谓语动词后不定式的作用
Source: Zhihu
(prepared by: alexcwlin; edited by: Adam Lam)

Question:
谓语动词加不定式结构中,不定式做什么句子成分?
比如want to do...

alexcwlin comments:
The short answer to your question is the Infinitive usually can either be:

1.     a Noun/Nominal Object to a Transitive Verb which it immediately follows, such as “I want to sing” (where “to sing” is a Nominal, Object of the Transitive Verb “want”), or

2.     a modifier (Adjective/Adjectival Phrase or Adverb/Adverbial Phrase) to an Intransitive Verb which it immediately follows, such as “I study to enrich my knowledge” (where “to enrich my knowledge” is an Adverbial Phrase modifying “study”).

In the case which you give “I want to do”, “want” can only be a Transitive Verb (check your dictionary to confirm).

A Transitive Verb most often needs an Object (which is usually a Noun or Nominal). Therefore “to do” is a Nominal, Object of the Transitive Verb “want”

In the case of a Linking Verb, such as “The aim is to help others”, the Infinitive Phrase “to help others” can be either a Nominal Subject Complement or an Adjectival Subject Complement.

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英语文法:谓语动词后不定式的作用

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